* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html,
body {
    width: 100%;
    height: 100%;
    font-family: "Microsoft YaHei", tahoma, arial, 'Hiragino Sans GB', '\5b8b\4f53', sans-serif;
}

a {
    text-decoration: none;
}

ul,
li {
    list-style: none;
}

i,
em {
    font-style: normal;
}

b,
strong {
    font-weight: normal;
}

.clearfix {
    zoom: 1;
}

.clearfix:after {
    content: "";
    clear: both;
    display: block;
    height: 0;
    visibility: hidden;
}

.D_is {
    display: flex;
}

.D_isc {
    align-items: center;
}

.ml_5 {
    margin-left: 5px;
}

.ml_12 {
    margin-left: 12px;
}

.container {
    width: 990px;
    margin: auto;
}

.contai {
    width: 1190px;
    margin: auto;
}

.ju_sb {
    justify-content: space-between;
}

.ju_sa {
    justify-content: space-around;
}